Tiger Corp. uses a perpetual FIFO inventory system. The following information was available for the month of August:

Beginning Inventory $25$ units at $$12$ per unit

August $510$ units purchased at $$13$ per unit

August $1815$ units purchased at $$14$ per unit

If Tiger Corp sold $12$ units for $$25$ per unit on August $15,$ what is the COGS on the date of the sale? What is ending inventory at August $31?$